Why does my electrical panel smell like burning plastic – Advice from Electriman, North London Electricians

## What Does a Burning Plastic Smell from My Consumer Unit Mean?

A burning or acrid plastic smell coming from your consumer unit (fuse box) is one of the clearest warning signs of a potentially dangerous electrical fault. It should never be dismissed as 'just a smell' — it means something inside is getting hot enough to melt or scorch insulation.

### Most Common Causes

- **Loose connections** — A terminal that has worked loose over time causes arcing, which generates intense localised heat

- **Overloaded circuit** — Too many high-draw appliances on one circuit causes the wiring or breaker to overheat

- **Failing MCB or RCD** — Breakers can degrade internally and overheat without tripping

- **Melting insulation on cables** — Often caused by sustained overload or rodent damage

- **Deteriorated wiring** — Older rubber or lead-sheathed wiring is especially vulnerable to heat damage

### What You Should Do Right Now

1. **Sniff carefully** — Is the smell faint and occasional, or strong and persistent?

2. **Look without touching** — Check for any visible scorch marks, discolouration, or melted plastic around the panel cover

3. **Feel the panel cover** — If it is warm or hot to the touch, that is a serious sign

4. **Check for tripped breakers** — A repeatedly tripping MCB on one circuit can indicate an overload causing heat

5. **Do NOT open the consumer unit yourself** — Live busbars inside can cause fatal electric shock

### When

Need a qualified electrician in North London?

Electriman covers Mill Hill, Barnet, Finchley, Edgware, Enfield, Watford and surrounding areas. All work is Part P certified and fully insured.